Effects of Varying Boundary Conditions on the Buried Pipelines

Abstract:

In this paper, the FORM (first order reliability method) has been employed to estimate the probability of failure for the buried pipeline degraded by corrosion defects. The estimated results are used to assess the reliability of buried pipeline exposed to varying external and internal boundary conditions corresponding to a required target safety level. Furthermore, the effects of distribution types of random variables affecting the strength of buried pipelines on the probability of failure and the reliability of the buried pipeline are systematically investigated. The plant-engineers should be informed about the margin of safety level of existing pipelines corresponding to the target safety level to assess the integrity of the corroded pipeline under operation.

• Periodical: Solid State Phenomena (Volume 110)
• Pages: 183-192
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.110.183
• Online since: March 2006
• Authors: Ouk Sub Lee, Dong Hyeok Kim
• Keywords: Boundary Condition, Buried Pipeline, Corrosion, First-Order Reliability Method (FORM), Probability of Failure, Reliability Estimation

References

[1] I. W. Bang, H. S. Kim, W. S. Kim, Y. C. Yang and K. W. Oh, Journal of the Korean Institute of Gas, Vol. 2, No. 2 (1998), p.18~25.

[2] O. S. Lee and D. H. Kim, Key Engineering Materials, Vol. 270~270 (2004), p.1688~1693.

[3] O. S. Lee, J. S. Pyun and D. H. Kim, International Journal of KSPE, Vol. 4, No. 6 (2003), p.12~19.

[4] M. Ahammed, International Journal of Pressure Vessels and Piping, Vol. 75 (1998), p.321~329.

[5] S. Mahadevan, and A. Haldar: Probability, Reliability and Statistical Method in Engineering Design (John Wiley & Sons, 2000).

[6] A. Halder and S. Mahadevan: Reliability Assessment Using Stochastic Finite Element Analysis (John Wiley & Sons, 2000).

[7] A. Muhammed, H. G. Pisarski and R. M. Sanderson: Calibration of Probability of Failure Estimation Made from Probabilistic Fracture Mechanics Analysis (HSE Books, 2002).

[8] M. Ahammed and R. E. Melchers, Engineering Structures, Vol. 19, No. 12 (1997), p.988~994.

[9] R. E. Melchers: Structural Reliability Analysis and Prediction (John Willey & Sons, 1987).

[10] A. P. Moser: Buried Pipe Design (McGraw-Hill, 1990).

[11] M. G. Spangler and R. L. Handy: Soil Engineering, 4th edition (Harper and Row, New York, 1982).

[12] Y. Chen, Math. Compute Modeling, Vol. 21, No. 11 (1995), p.47�60.

[13] R. Sadiq, B. Rajani and Y. Kleiner, Reliability Engineering and Systems Safety, Vol. 86 (2004), p.1~10.

[14] Bomel Limited: Probabilistic methods : Uses and abuses in structural integrity (HSE, 2001).